Which best describes the testes?

a. They produce hormones and sperm.

b. They are the male copulatrry organ.

c. They give sperm nourishment and motility.

d. They are the pouch-like skin that protects the scrotum.

Biotechnology has given humans the ability to see what a person's genes will be like before they are even born. Why is choosing whether or not to test an unborn child for a genetic disease an ethical decision? A.

Which features are unique to insects as compared to birds? A.) bilateral symmetry and sexual reproduction B.) antennae and exoskeleton C.) sexual reproduction and nervous system D.) exoskeleton and bilateral symmetry

Which molecule carries the instructions for producing mrna

What do you think will happen to the cell and the organism over time if it can't produce energy?

Differentiation switches certain genes on and off to create specialized cells. true false

Why is carbon essential to all known life on Earth?

Why are only inherited traits involved in the process of evolution?

What are uses of nuclear power?

What is the ultimate energy source for the producers

Which process is a form of mechanical weathering? A. Hydration B. Carbonation C. Exfoliation D. Oxidation